Seems like I saw mention of some others owning M1s, so lets see 'em!
Heres Mine:
Springfield Armory (six digit serial 866xxx) Sept. 1942
It was rebarreled in 1952 for the Korean conflict. The stock is a correct 1942 with proof mark (S/N 665,000- 2,092,000 June 1942-October 1943
S. A. / E.McF. (Springfield Armory / Earl McFarland) It also has what looks like a few "kill notches" on the back of the stock.